HarFileSystem (Apache Hadoop Common 2.10.0 API)

java.lang.Object
- org.apache.hadoop.conf.Configured
- - org.apache.hadoop.fs.FileSystem
  - - org.apache.hadoop.fs.HarFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable, Configurable
```
public class HarFileSystem
extends FileSystem
```
This is an implementation of the Hadoop Archive Filesystem. This archive Filesystem has index files of the form _index* and has contents of the form part-*. The index files store the indexes of the real files. The index files are of the form _masterindex and _index. The master index is a level of indirection in to the index file to make the look ups faster. the index file is sorted with hash code of the paths that it contains and the master index contains pointers to the positions in index for ranges of hashcodes.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.hadoop.fs.FileSystem
  FileSystem.Statistics

Field Summary

Fields
Modifier and Type Field and Description

static int METADATA_CACHE_ENTRIES_DEFAULT

static String METADATA_CACHE_ENTRIES_KEY

static int VERSION
- Fields inherited from class org.apache.hadoop.fs.FileSystem
  DEFAULT_FS, FS_DEFAULT_NAME_KEY, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX, USER_HOME_PREFIX

Fields
Modifier and Type	Field and Description
`static int`	`METADATA_CACHE_ENTRIES_DEFAULT`
`static String`	`METADATA_CACHE_ENTRIES_KEY`
`static int`	`VERSION`

Constructor Summary

Constructors
Constructor and Description
`HarFileSystem()` public construction of harfilesystem
`HarFileSystem(FileSystem fs)` Constructor to create a HarFileSystem with an underlying filesystem.

Method Summary

Methods
Modifier and Type	Method and Description
`FSDataOutputStream`	`append(Path f)` Append to an existing file (optional operation).
`FSDataOutputStream`	`append(Path f, int bufferSize, Progressable progress)` Append to an existing file (optional operation).
`FSDataOutputStreamBuilder`	`appendFile(Path path)` Create a Builder to append a file.
`protected URI`	`canonicalizeUri(URI uri)` Canonicalize the given URI.
`protected void`	`checkPath(Path path)` Check that a Path belongs to this FileSystem.
`void`	`close()` Close this FileSystem instance.
`void`	`completeLocalOutput(Path fsOutputFile, Path tmpLocalFile)` not implemented.
`void`	`copyFromLocalFile(boolean delSrc, boolean overwrite, Path[] srcs, Path dst)` The src files are on the local disk.
`void`	`copyFromLocalFile(boolean delSrc, boolean overwrite, Path src, Path dst)` not implemented.
`void`	`copyToLocalFile(boolean delSrc, Path src, Path dst)` copies the file in the har filesystem to a local file.
`FSDataOutputStream`	`create(Path f, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Create an FSDataOutputStream at the indicated Path with write-progress reporting.
`FSDataOutputStreamBuilder`	`createFile(Path path)` Create a new FSDataOutputStreamBuilder for the file with path.
`FSDataOutputStream`	`createNonRecursive(Path f, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Opens an FSDataOutputStream at the indicated Path with write-progress reporting.
`boolean`	`delete(Path f, boolean recursive)` Not implemented.
`protected URI`	`getCanonicalUri()` Used for delegation token related functionality.
`FileSystem[]`	`getChildFileSystems()` Used for delegation token related functionality.
`Configuration`	`getConf()` Return the configuration used by this object.
`long`	`getDefaultBlockSize()` Return the number of bytes that large input files should be optimally be split into to minimize I/O time.
`long`	`getDefaultBlockSize(Path f)` Return the number of bytes that large input files should be optimally be split into to minimize I/O time.
`short`	`getDefaultReplication()` Get the default replication.
`short`	`getDefaultReplication(Path f)` Get the default replication for a path.
`BlockLocation[]`	`getFileBlockLocations(FileStatus file, long start, long len)` Get block locations from the underlying fs and fix their offsets and lengths.
`FileChecksum`	`getFileChecksum(Path f, long length)` Get the checksum of a file, from the beginning of the file till the specific length.
`FileStatus`	`getFileStatus(Path f)` return the filestatus of files in har archive.
`static int`	`getHarHash(Path p)` the hash of the path p inside the filesystem
`int`	`getHarVersion()`
`Path`	`getHomeDirectory()` return the top level archive path.
`Path`	`getInitialWorkingDirectory()` Note: with the new FileContext class, getWorkingDirectory() will be removed.
`String`	`getScheme()` Return the protocol scheme for the FileSystem.
`FsServerDefaults`	`getServerDefaults()` Return a set of server default configuration values.
`FsServerDefaults`	`getServerDefaults(Path f)` Return a set of server default configuration values.
`FsStatus`	`getStatus(Path p)` Returns a status object describing the use and capacity of the filesystem.
`URI`	`getUri()` Returns the uri of this filesystem.
`long`	`getUsed()` Return the total size of all files in the filesystem.
`long`	`getUsed(Path path)` Return the total size of all files from a specified path.
`Path`	`getWorkingDirectory()` return the top level archive.
`void`	`initialize(URI name, Configuration conf)` Initialize a Har filesystem per har archive.
`FileStatus[]`	`listStatus(Path f)` liststatus returns the children of a directory after looking up the index files.
`Path`	`makeQualified(Path path)` Qualify a path to one which uses this FileSystem and, if relative, made absolute.
`boolean`	`mkdirs(Path f, FsPermission permission)` not implemented.
`FSDataInputStream`	`open(Path f, int bufferSize)` Returns a har input stream which fakes end of file.
`boolean`	`rename(Path src, Path dst)` Renames Path src to Path dst.
`Path`	`resolvePath(Path p)` Return the fully-qualified path of path, resolving the path through any symlinks or mount point.
`void`	`setOwner(Path p, String username, String groupname)` not implemented.
`void`	`setPermission(Path p, FsPermission permission)` Not implemented.
`boolean`	`setReplication(Path src, short replication)` Not implemented.
`void`	`setTimes(Path p, long mtime, long atime)` Set access time of a file.
`void`	`setWorkingDirectory(Path newDir)` Set the current working directory for the given FileSystem.
`Path`	`startLocalOutput(Path fsOutputFile, Path tmpLocalFile)` not implemented.
`boolean`	`truncate(Path f, long newLength)` Not implemented.

Methods inherited from class org.apache.hadoop.fs.FileSystem
addDelegationTokens, append, areSymlinksEnabled, cancelDeleteOnExit, clearStatistics, closeAll, closeAllForUGI, concat, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, create, createNewFile, createNonRecursive, createNonRecursive, createSnapshot, createSnapshot, createSymlink, delete, deleteOnExit, deleteSnapshot, enableSymlinks, exists, fixRelativePart, get, get, get, getAclStatus, getAllStatistics, getAllStoragePolicies, getBlockSize, getCanonicalServiceName, getContentSummary, getDefaultPort, getDefaultUri, getFileBlockLocations, getFileChecksum, getFileLinkStatus, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getLength, getLinkTarget, getLocal, getName, getNamed, getQuotaUsage, getReplication, getStatistics, getStatistics, getStatus, getStoragePolicy, getStorageStatistics, getTrashRoot, getTrashRoots, getXAttr, getXAttrs, getXAttrs, globStatus, globStatus, isDirectory, isFile, listCorruptFileBlocks, listFiles, listLocatedStatus, listLocatedStatus, listStatus, listStatus, listStatus, listStatusIterator, listXAttrs, mkdirs, mkdirs, modifyAclEntries, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, newInstance, newInstance, newInstance, newInstanceLocal, open, primitiveCreate, primitiveMkdir, primitiveMkdir, printStatistics, processDeleteOnExit, removeAcl, removeAclEntries, removeDefaultAcl, removeXAttr, rename, renameSnapshot, resolveLink, setAcl, setDefaultUri, setDefaultUri, setStoragePolicy, setVerifyChecksum, setWriteChecksum, setXAttr, setXAttr, supportsSymlinks, unsetStoragePolicy

Methods inherited from class org.apache.hadoop.conf.Configured
setConf

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - METADATA_CACHE_ENTRIES_KEY
```
public static final String METADATA_CACHE_ENTRIES_KEY
```
    See Also:
    Constant Field Values
  - METADATA_CACHE_ENTRIES_DEFAULT
```
public static final int METADATA_CACHE_ENTRIES_DEFAULT
```
    See Also:
    Constant Field Values
  - VERSION
```
public static final int VERSION
```
    See Also:
    Constant Field Values
- Constructor Detail
  - HarFileSystem
```
public HarFileSystem()
```
    public construction of harfilesystem
  - HarFileSystem
```
public HarFileSystem(FileSystem fs)
```
    Constructor to create a HarFileSystem with an underlying filesystem.
    
    Parameters:
    fs - underlying file system
- Method Detail
  - getScheme
```
public String getScheme()
```
    Return the protocol scheme for the FileSystem.
    
    Overrides:
    
    getScheme in class FileSystem
    
    Returns:
    har
  - initialize
```
public void initialize(URI name,
              Configuration conf)
                throws IOException
```
    Initialize a Har filesystem per har archive. The archive home directory is the top level directory in the filesystem that contains the HAR archive. Be careful with this method, you do not want to go on creating new Filesystem instances per call to path.getFileSystem(). the uri of Har is har://underlyingfsscheme-host:port/archivepath. or har:///archivepath. This assumes the underlying filesystem to be used in case not specified.
    
    Overrides:
    
    initialize in class FileSystem
    
    Parameters:
    name - a URI whose authority section names the host, port, etc. for this FileSystem
    conf - the configuration
    
    Throws:
    
    IOException - on any failure to initialize this instance.
  - getConf
```
public Configuration getConf()
```
    Description copied from interface: Configurable
    
    Return the configuration used by this object.
    
    Specified by:
    
    getConf in interface Configurable
    
    Overrides:
    
    getConf in class Configured
  - getHarVersion
```
public int getHarVersion()
                  throws IOException
```
    Throws:
    
    IOException
  - getWorkingDirectory
```
public Path getWorkingDirectory()
```
    return the top level archive.
    
    Specified by:
    
    getWorkingDirectory in class FileSystem
    
    Returns:
    the directory pathname
  - getInitialWorkingDirectory
```
public Path getInitialWorkingDirectory()
```
    Description copied from class: FileSystem
    
    Note: with the new FileContext class, getWorkingDirectory() will be removed. The working directory is implemented in FileContext. Some FileSystems like LocalFileSystem have an initial workingDir that we use as the starting workingDir. For other file systems like HDFS there is no built in notion of an initial workingDir.
    
    Overrides:
    
    getInitialWorkingDirectory in class FileSystem
    
    Returns:
    if there is built in notion of workingDir then it is returned; else a null is returned.
  - getStatus
```
public FsStatus getStatus(Path p)
                   throws IOException
```
    Description copied from class: FileSystem
    
    Returns a status object describing the use and capacity of the filesystem. If the filesystem has multiple partitions, the use and capacity of the partition pointed to by the specified path is reflected.
    
    Overrides:
    
    getStatus in class FileSystem
    
    Parameters:
    p - Path for which status should be obtained. null means the default partition.
    
    Returns:
    a FsStatus object
    
    Throws:
    
    IOException - see specific implementation
  - getCanonicalUri
```
protected URI getCanonicalUri()
```
    Used for delegation token related functionality. Must delegate to underlying file system.
    
    Overrides:
    
    getCanonicalUri in class FileSystem
    
    See Also:
    FileSystem.canonicalizeUri(URI)
  - canonicalizeUri
```
protected URI canonicalizeUri(URI uri)
```
    Description copied from class: FileSystem
    
    Canonicalize the given URI. This is implementation-dependent, and may for example consist of canonicalizing the hostname using DNS and adding the default port if not specified. The default implementation simply fills in the default port if not specified and if FileSystem.getDefaultPort() returns a default port.
    
    Overrides:
    
    canonicalizeUri in class FileSystem
    
    Returns:
    URI
    See Also:
    NetUtils.getCanonicalUri(URI, int)
  - getUri
```
public URI getUri()
```
    Returns the uri of this filesystem. The uri is of the form har://underlyingfsschema-host:port/pathintheunderlyingfs
    
    Specified by:
    
    getUri in class FileSystem
    
    Returns:
    the URI of this filesystem.
  - checkPath
```
protected void checkPath(Path path)
```
    Description copied from class: FileSystem
    
    Check that a Path belongs to this FileSystem. The base implementation performs case insensitive equality checks of the URIs' schemes and authorities. Subclasses may implement slightly different checks.
    
    Overrides:
    
    checkPath in class FileSystem
    
    Parameters:
    path - to check
  - resolvePath
```
public Path resolvePath(Path p)
                 throws IOException
```
    Description copied from class: FileSystem
    
    Return the fully-qualified path of path, resolving the path through any symlinks or mount point.
    
    Overrides:
    
    resolvePath in class FileSystem
    
    Parameters:
    p - path to be resolved
    
    Returns:
    fully qualified path
    
    Throws:
    
    FileNotFoundException - if the path is not present
    
    IOException - for any other error
  - makeQualified
```
public Path makeQualified(Path path)
```
    Description copied from class: FileSystem
    
    Qualify a path to one which uses this FileSystem and, if relative, made absolute.
    
    Overrides:
    
    makeQualified in class FileSystem
    
    Parameters:
    path - to qualify.
    
    Returns:
    this path if it contains a scheme and authority and is absolute, or a new path that includes a path and authority and is fully qualified
    See Also:
    Path.makeQualified(URI, Path)
  - getFileBlockLocations
```
public BlockLocation[] getFileBlockLocations(FileStatus file,
                                    long start,
                                    long len)
                                      throws IOException
```
    Get block locations from the underlying fs and fix their offsets and lengths.
    
    Overrides:
    
    getFileBlockLocations in class FileSystem
    
    Parameters:
    file - the input file status to get block locations
    start - the start of the desired range in the contained file
    len - the length of the desired range
    
    Returns:
    block locations for this segment of file
    
    Throws:
    
    IOException
  - getHarHash
```
public static int getHarHash(Path p)
```
    the hash of the path p inside the filesystem
    
    Parameters:
    p - the path in the harfilesystem
    
    Returns:
    the hash code of the path.
  - getFileStatus
```
public FileStatus getFileStatus(Path f)
                         throws IOException
```
    return the filestatus of files in har archive. The permission returned are that of the archive index files. The permissions are not persisted while creating a hadoop archive.
    
    Specified by:
    
    getFileStatus in class FileSystem
    
    Parameters:
    f - the path in har filesystem
    
    Returns:
    filestatus.
    
    Throws:
    
    IOException
    
    FileNotFoundException - when the path does not exist
  - getFileChecksum
```
public FileChecksum getFileChecksum(Path f,
                           long length)
```
    Description copied from class: FileSystem
    
    Get the checksum of a file, from the beginning of the file till the specific length.
    
    Overrides:
    
    getFileChecksum in class FileSystem
    
    Parameters:
    f - The file path
    length - The length of the file range for checksum calculation
    
    Returns:
    null since no checksum algorithm is implemented.
  - open
```
public FSDataInputStream open(Path f,
                     int bufferSize)
                       throws IOException
```
    Returns a har input stream which fakes end of file. It reads the index files to get the part file name and the size and start of the file.
    
    Specified by:
    
    open in class FileSystem
    
    Parameters:
    f - the file name to open
    bufferSize - the size of the buffer to be used.
    
    Throws:
    
    IOException - IO failure
  - getChildFileSystems
```
public FileSystem[] getChildFileSystems()
```
    Used for delegation token related functionality. Must delegate to underlying file system.
    
    Returns:
    FileSystems that are direct children of this FileSystem, or null for "no children"
  - create
```
public FSDataOutputStream create(Path f,
                        FsPermission permission,
                        boolean overwrite,
                        int bufferSize,
                        short replication,
                        long blockSize,
                        Progressable progress)
                          throws IOException
```
    Description copied from class: FileSystem
    
    Create an FSDataOutputStream at the indicated Path with write-progress reporting.
    
    Specified by:
    
    create in class FileSystem
    
    Parameters:
    f - the file name to open
    permission - file permission
    overwrite - if a file with this name already exists, then if true, the file will be overwritten, and if false an error will be thrown.
    bufferSize - the size of the buffer to be used.
    replication - required block replication for the file.
    blockSize - block size
    progress - the progress reporter
    
    Throws:
    
    IOException - IO failure
    See Also:
    FileSystem.setPermission(Path, FsPermission)
  - createNonRecursive
```
public FSDataOutputStream createNonRecursive(Path f,
                                    boolean overwrite,
                                    int bufferSize,
                                    short replication,
                                    long blockSize,
                                    Progressable progress)
                                      throws IOException
```
    Description copied from class: FileSystem
    
    Opens an FSDataOutputStream at the indicated Path with write-progress reporting. Same as create(), except fails if parent directory doesn't already exist.
    
    Overrides:
    
    createNonRecursive in class FileSystem
    
    Parameters:
    f - the file name to open
    overwrite - if a file with this name already exists, then if true, the file will be overwritten, and if false an error will be thrown.
    bufferSize - the size of the buffer to be used.
    replication - required block replication for the file.
    blockSize - block size
    progress - the progress reporter
    
    Throws:
    
    IOException - IO failure
    See Also:
    FileSystem.setPermission(Path, FsPermission)
  - append
```
public FSDataOutputStream append(Path f,
                        int bufferSize,
                        Progressable progress)
                          throws IOException
```
    Description copied from class: FileSystem
    
    Append to an existing file (optional operation).
    
    Specified by:
    
    append in class FileSystem
    
    Parameters:
    f - the existing file to be appended.
    bufferSize - the size of the buffer to be used.
    progress - for reporting progress if it is not null.
    
    Throws:
    
    IOException - IO failure
  - close
```
public void close()
           throws IOException
```
    Description copied from class: FileSystem
    
    Close this FileSystem instance. Will release any held locks, delete all files queued for deletion through calls to FileSystem.deleteOnExit(Path), and remove this FS instance from the cache, if cached. After this operation, the outcome of any method call on this FileSystem instance, or any input/output stream created by it is undefined.
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Overrides:
    
    close in class FileSystem
    
    Throws:
    
    IOException - IO failure
  - setReplication
```
public boolean setReplication(Path src,
                     short replication)
                       throws IOException
```
    Not implemented.
    
    Overrides:
    
    setReplication in class FileSystem
    
    Parameters:
    src - file name
    replication - new replication
    
    Returns:
    true if successful, or the feature in unsupported; false if replication is supported but the file does not exist, or is a directory
    
    Throws:
    
    IOException
  - rename
```
public boolean rename(Path src,
             Path dst)
               throws IOException
```
    Description copied from class: FileSystem
    
    Renames Path src to Path dst.
    
    Specified by:
    
    rename in class FileSystem
    
    Parameters:
    src - path to be renamed
    dst - new path after rename
    
    Returns:
    true if rename is successful
    
    Throws:
    
    IOException - on failure
  - append
```
public FSDataOutputStream append(Path f)
                          throws IOException
```
    Description copied from class: FileSystem
    
    Append to an existing file (optional operation). Same as append(f, getConf().getInt(IO_FILE_BUFFER_SIZE_KEY, IO_FILE_BUFFER_SIZE_DEFAULT), null)
    
    Overrides:
    
    append in class FileSystem
    
    Parameters:
    f - the existing file to be appended.
    
    Throws:
    
    IOException - IO failure
  - truncate
```
public boolean truncate(Path f,
               long newLength)
                 throws IOException
```
    Not implemented.
    
    Overrides:
    
    truncate in class FileSystem
    
    Parameters:
    f - The path to the file to be truncated
    newLength - The size the file is to be truncated to
    
    Returns:
    true if the file has been truncated to the desired newLength and is immediately available to be reused for write operations such as append, or false if a background process of adjusting the length of the last block has been started, and clients should wait for it to complete before proceeding with further file updates.
    
    Throws:
    
    IOException - IO failure
  - delete
```
public boolean delete(Path f,
             boolean recursive)
               throws IOException
```
    Not implemented.
    
    Specified by:
    
    delete in class FileSystem
    
    Parameters:
    f - the path to delete.
    recursive - if path is a directory and set to true, the directory is deleted else throws an exception. In case of a file the recursive can be set to either true or false.
    
    Returns:
    true if delete is successful else false.
    
    Throws:
    
    IOException - IO failure
  - listStatus
```
public FileStatus[] listStatus(Path f)
                        throws IOException
```
    liststatus returns the children of a directory after looking up the index files.
    
    Specified by:
    
    listStatus in class FileSystem
    
    Parameters:
    f - given path
    
    Returns:
    the statuses of the files/directories in the given patch
    
    Throws:
    
    FileNotFoundException - when the path does not exist
    
    IOException - see specific implementation
  - getHomeDirectory
```
public Path getHomeDirectory()
```
    return the top level archive path.
    
    Overrides:
    
    getHomeDirectory in class FileSystem
  - setWorkingDirectory
```
public void setWorkingDirectory(Path newDir)
```
    Description copied from class: FileSystem
    
    Set the current working directory for the given FileSystem. All relative paths will be resolved relative to it.
    
    Specified by:
    
    setWorkingDirectory in class FileSystem
    
    Parameters:
    newDir - Path of new working directory
  - mkdirs
```
public boolean mkdirs(Path f,
             FsPermission permission)
               throws IOException
```
    not implemented.
    
    Specified by:
    
    mkdirs in class FileSystem
    
    Parameters:
    f - path to create
    permission - to apply to f
    
    Throws:
    
    IOException - IO failure
  - copyFromLocalFile
```
public void copyFromLocalFile(boolean delSrc,
                     boolean overwrite,
                     Path src,
                     Path dst)
                       throws IOException
```
    not implemented.
    
    Overrides:
    
    copyFromLocalFile in class FileSystem
    
    Parameters:
    delSrc - whether to delete the src
    overwrite - whether to overwrite an existing file
    src - path
    dst - path
    
    Throws:
    
    IOException - IO failure
  - copyFromLocalFile
```
public void copyFromLocalFile(boolean delSrc,
                     boolean overwrite,
                     Path[] srcs,
                     Path dst)
                       throws IOException
```
    Description copied from class: FileSystem
    
    The src files are on the local disk. Add it to the filesystem at the given dst name. delSrc indicates if the source should be removed
    
    Overrides:
    
    copyFromLocalFile in class FileSystem
    
    Parameters:
    delSrc - whether to delete the src
    overwrite - whether to overwrite an existing file
    srcs - array of paths which are source
    dst - path
    
    Throws:
    
    IOException - IO failure
  - copyToLocalFile
```
public void copyToLocalFile(boolean delSrc,
                   Path src,
                   Path dst)
                     throws IOException
```
    copies the file in the har filesystem to a local file.
    
    Overrides:
    
    copyToLocalFile in class FileSystem
    
    Parameters:
    delSrc - whether to delete the src
    src - path src file in the remote filesystem
    dst - path local destination
    
    Throws:
    
    IOException - IO failure
  - startLocalOutput
```
public Path startLocalOutput(Path fsOutputFile,
                    Path tmpLocalFile)
                      throws IOException
```
    not implemented.
    
    Overrides:
    
    startLocalOutput in class FileSystem
    
    Parameters:
    fsOutputFile - path of output file
    tmpLocalFile - path of local tmp file
    
    Throws:
    
    IOException - IO failure
  - completeLocalOutput
```
public void completeLocalOutput(Path fsOutputFile,
                       Path tmpLocalFile)
                         throws IOException
```
    not implemented.
    
    Overrides:
    
    completeLocalOutput in class FileSystem
    
    Parameters:
    fsOutputFile - path of output file
    tmpLocalFile - path to local tmp file
    
    Throws:
    
    IOException - IO failure
  - setOwner
```
public void setOwner(Path p,
            String username,
            String groupname)
              throws IOException
```
    not implemented.
    
    Overrides:
    
    setOwner in class FileSystem
    
    Parameters:
    p - The path
    username - If it is null, the original username remains unchanged.
    groupname - If it is null, the original groupname remains unchanged.
    
    Throws:
    
    IOException - IO failure
  - setTimes
```
public void setTimes(Path p,
            long mtime,
            long atime)
              throws IOException
```
    Description copied from class: FileSystem
    
    Set access time of a file.
    
    Overrides:
    
    setTimes in class FileSystem
    
    Parameters:
    p - The path
    mtime - Set the modification time of this file. The number of milliseconds since Jan 1, 1970. A value of -1 means that this call should not set modification time.
    atime - Set the access time of this file. The number of milliseconds since Jan 1, 1970. A value of -1 means that this call should not set access time.
    
    Throws:
    
    IOException - IO failure
  - setPermission
```
public void setPermission(Path p,
                 FsPermission permission)
                   throws IOException
```
    Not implemented.
    
    Overrides:
    
    setPermission in class FileSystem
    
    Parameters:
    p - The path
    permission - permission
    
    Throws:
    
    IOException - IO failure
  - getServerDefaults
```
public FsServerDefaults getServerDefaults()
                                   throws IOException
```
    Description copied from class: FileSystem
    
    Return a set of server default configuration values.
    
    Overrides:
    
    getServerDefaults in class FileSystem
    
    Returns:
    server default configuration values
    
    Throws:
    
    IOException - IO failure
  - getServerDefaults
```
public FsServerDefaults getServerDefaults(Path f)
                                   throws IOException
```
    Description copied from class: FileSystem
    
    Return a set of server default configuration values.
    
    Overrides:
    
    getServerDefaults in class FileSystem
    
    Parameters:
    f - path is used to identify an FS since an FS could have another FS that it could be delegating the call to
    
    Returns:
    server default configuration values
    
    Throws:
    
    IOException - IO failure
  - getUsed
```
public long getUsed()
             throws IOException
```
    Description copied from class: FileSystem
    
    Return the total size of all files in the filesystem.
    
    Overrides:
    
    getUsed in class FileSystem
    
    Throws:
    
    IOException - IO failure
  - getUsed
```
public long getUsed(Path path)
             throws IOException
```
    Return the total size of all files from a specified path.
    
    Overrides:
    
    getUsed in class FileSystem
    
    Throws:
    
    IOException - IO failure
  - getDefaultBlockSize
```
public long getDefaultBlockSize()
```
    Description copied from class: FileSystem
    
    Return the number of bytes that large input files should be optimally be split into to minimize I/O time.
    
    Overrides:
    
    getDefaultBlockSize in class FileSystem
  - getDefaultBlockSize
```
public long getDefaultBlockSize(Path f)
```
    Description copied from class: FileSystem
    
    Return the number of bytes that large input files should be optimally be split into to minimize I/O time. The given path will be used to locate the actual filesystem. The full path does not have to exist.
    
    Overrides:
    
    getDefaultBlockSize in class FileSystem
    
    Parameters:
    f - path of file
    
    Returns:
    the default block size for the path's filesystem
  - getDefaultReplication
```
public short getDefaultReplication()
```
    Description copied from class: FileSystem
    
    Get the default replication.
    
    Overrides:
    
    getDefaultReplication in class FileSystem
    
    Returns:
    the replication; the default value is "1".
  - getDefaultReplication
```
public short getDefaultReplication(Path f)
```
    Description copied from class: FileSystem
    
    Get the default replication for a path. The given path will be used to locate the actual FileSystem to query. The full path does not have to exist.
    
    Overrides:
    
    getDefaultReplication in class FileSystem
    
    Parameters:
    f - of the file
    
    Returns:
    default replication for the path's filesystem
  - createFile
```
public FSDataOutputStreamBuilder createFile(Path path)
```
    Description copied from class: FileSystem
    
    Create a new FSDataOutputStreamBuilder for the file with path. Files are overwritten by default.
    
    Overrides:
    
    createFile in class FileSystem
    
    Parameters:
    path - file path
    
    Returns:
    a FSDataOutputStreamBuilder object to build the file HADOOP-14384. Temporarily reduce the visibility of method before the builder interface becomes stable.
  - appendFile
```
public FSDataOutputStreamBuilder appendFile(Path path)
```
    Description copied from class: FileSystem
    
    Create a Builder to append a file.
    
    Overrides:
    
    appendFile in class FileSystem
    
    Parameters:
    path - file path.
    
    Returns:
    a FSDataOutputStreamBuilder to build file append request.

Class HarFileSystem

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.fs.FileSystem

Field Summary

Fields inherited from class org.apache.hadoop.fs.FileSystem

Constructor Summary

Method Summary

Methods inherited from class org.apache.hadoop.fs.FileSystem

Methods inherited from class org.apache.hadoop.conf.Configured

Methods inherited from class java.lang.Object

Field Detail

METADATA_CACHE_ENTRIES_KEY

METADATA_CACHE_ENTRIES_DEFAULT

VERSION

Constructor Detail

HarFileSystem

HarFileSystem

Method Detail

getScheme

initialize

getConf

getHarVersion

getWorkingDirectory

getInitialWorkingDirectory

getStatus

getCanonicalUri

canonicalizeUri

getUri

checkPath

resolvePath

makeQualified

getFileBlockLocations

getHarHash

getFileStatus

getFileChecksum

open

getChildFileSystems

create

createNonRecursive

append

close

setReplication

rename

append

truncate

delete

listStatus

getHomeDirectory

setWorkingDirectory

mkdirs

copyFromLocalFile

copyFromLocalFile

copyToLocalFile

startLocalOutput

completeLocalOutput

setOwner

setTimes

setPermission

getServerDefaults

getServerDefaults

getUsed

getUsed

getDefaultBlockSize

getDefaultBlockSize

getDefaultReplication

getDefaultReplication

createFile

appendFile